Count Up to Subtract

Solve 83 − 79 by counting up from 79.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 32

83 minus 79. These numbers are close together, so count up from 79 to 83!
79 to 80 is 1. 80 to 83 is 3. 1 plus 3 is 4. So 83 minus 79 is 4!
Let's try 72 minus 48. Hop 2 to the friendly 50, then 20 to 70, then 2 more to 72. 2 plus 20 plus 2 is 24.
Counting up is great when the numbers are close. 61 minus 58 is just 3!

Georgia's K-12 Mathematics Standards:

2.NR.2.4 — Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.